Why is tile roof coating worth doing?
The true condition of a tile roof is often only visible when examining the tile surface up close. The porous surface of the tile reveals that the coating has worn away, sometimes completely.
The factory coating wears away over the years, revealing a faded and porous surface. Such a surface is vulnerable to moss and moisture-induced frost damage: when freezing water expands, it weakens the tile and eventually causes it to crack. Through a cracked tile, water can reach the underlayment, where it can cause damage. The purpose of tile roof painting is to restore a protective layer to the tile surface.
Tile roof coating done in time extends the roof's lifespan, and this way more extensive roof renovations can be avoided. This saves both the environment and money. Roof coating can be done on a building whose roof structure is otherwise in good condition.